i think david is right, he does crystallize, but he makes the argument for obama better than obama does. he is a brill advocate, and i think he's a far better advocate when speaking for somebody else than he is on his own behalf. he is not eloquent but he is critizealizing. i did not hear a lot of crystallizing in tampa. maybe i missed it. i think crystallizing is in rare, rare supply this campaign season. >> ifill: we know what to listen tonight from both of you. and we'll be back with much more convention coverage, all that after the, news of the day. here's kwame holman. >> holman: republicans today offered their own critical take on the democratic convention. in idell, iowa, vice presidential candidate paul ryan said tonight's main speaker former president bill clinton will try to shift attention from mr. obama's economic record. >> we're going to hear a lot of things in charlotte, but we're not going to hear a convincing argument that we're better off than we were four years ago. we're going to hear from president clinton tonight in charlotte. my guess is we'll get a great renditio